Tunable full waveband- and adjustable spacing multi-wavelength erbium-doped fiber laser based on controlling cavity losses through bending sensitive interferometric filter

Merza, Haneen Qassim; Al-Hayali, Sarah Kadhim; Al‐Janabi, Abdulhadi

doi:10.1016/j.infrared.2021.103791

Cited by 10 publications

(4 citation statements)

References 50 publications

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“…However, the flexibility of the switching wavelength operations sacrifices the simplified structure and the tunability, which in turn increases the cost of the system. 26 Recently, Merza et al 27,28 reported all-fiber comb filters based on bending loss in a single-mode fiber (SMF) into a balloon-like shape for multiwavelength fiber laser generation. The reported technique was easily used to select between tunable single-or multiwavelength switchable operations over 1 and 1.55 μm regions.…”

Section: Introductionmentioning

confidence: 99%

Switchable mode-locked ytterbium-doped fiber laser based on macrobending loss tuning of figure-eight knot fiber structure

Al-Janabi,

Merza,

Al-Hayali

et al. 2024

Opt. Eng.

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We report on the demonstration of a switchable and adjustable spacing multiwavelength nanosecond pulsed ytterbium-doped fiber laser (YDFL) operating in a modelocking regime by macrobending loss tuning induced in a figure-eight knot shape. The figure-eight knot-based Mach-Zehnder interferometer (MZI) was established by wrapping a section of single-mode fiber into two elliptical loops by twisting one end of the fiber onto the other without splicing. Combining the proposed MZI with a polarization controller (PC) acts as a selective comb filter and a nanosecond pulse generator. By appropriately adjusting the bending diameter of the MZI structure inside the YDFL cavity, the laser can be operated in a single-and dual-wavelength with a maximum spacing range of 18.5 nm. Furthermore, the number of lasing wavelengths was directly controlled by only altering the pump power; dual and triple wavelengths were achieved as the pump power was increased from 127 to 210 mW, respectively. The appropriate adjustment of the PC cascaded with the proposed comb filter in the laser cavity allows for the generation of up to quadruple switchable wavelengths of nanosecond mode-locking pulses with a pulse duration of 6.2 ns and repetition rate of 71.4 MHz located between 1061.17 and 1038.92 nm. The experimental results indicate that the proposed configuration of the MZI-based comb filter can provide great potential in various photonics applications.

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Section: Introductionmentioning

confidence: 99%

Switchable mode-locked ytterbium-doped fiber laser based on macrobending loss tuning of figure-eight knot fiber structure

Al-Janabi,

Merza,

Al-Hayali

et al. 2024

Opt. Eng.

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“…In recent years, owing to their many benefits, including their high efficiency, robustness, low cost, high signal-to-noise ratio, and compact structure, the generation of dual-wavelength or multi-wavelength fiber lasers have been extensively investigated 7 , 8 . They have a wide range of application prospects in various fields including wavelength-division multiplexed communication, laser comb generation, and optical fiber sensing 9 – 11 Incorporation typically of a comb filter into a fiber laser cavity produces multiple seed signals which are necessary for the realization of a multi-wavelength fiber laser 12 …”

Section: Introductionmentioning

confidence: 99%

“…7,8 They have a wide range of application prospects in various fields including wavelength-division multiplexed communication, laser comb generation, and optical fiber sensing. [9][10][11] Incorporation typically of a comb filter into a fiber laser cavity produces multiple seed signals which are necessary for the realization of a multi-wavelength fiber laser. [12][13][14][15] The output spectrum with periodic resonant frequencies is created post-filtering process, whereby the space between the two adjacent frequencies is defined as the free spectral range (FSR).…”

Section: Introductionmentioning

confidence: 99%

Fiber laser with dual-channel and a selectable comb filter based on Vernier effect of parallel-connected two Mach–Zehnder interferometers

2023

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We propose and demonstrate the implementation and application of a new configuration of an all-fiber comb filter based on the Vernier effect produced by parallelconnected two in-line Mach-Zehnder interferometers (MZIs). Each in-line MZI was fabricated by fusion splicing a section of panda-type polarization maintaining fiber (PMF) with peanut-shaped tapers between two single-mode fibers. These two in-line MZIs, respectively, form reference and sensing interferometers, which are parallelconnected by two 3-dB optical fiber couplers to realize the Vernier effect. By incorporating the proposed comb-filter into the erbium-doped fiber laser cavity, two output channels at 1533.2 and 1558.2 nm have been achieved. Further, the combination of the parallel-connected two in-line MZIs and polarization controllers (PC1 and PC2) promotes the lasing in a switchable and selective way. To the best of the authors' knowledge, this is the first demonstration of a comb filter that employs paralleled two peanut-shaped MZIs in PMF. The experimental results indicate that the proposed filter has the potential to be used in communication systems.

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“…Nowadays, the tunable and switchable multi-wavelength EDFL is widely used in optical fiber communication systems [1]. On the one hand, multi-wavelength EDFL has more laser lines, high output power, high stability and wide tuning range [2].…”

Section: Introductionmentioning

confidence: 99%

Tunable and Switchable Multi-Wavelength Erbium-Doped Fiber Laser Based on Composite Structure Filter

et al. 2022

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A multi-wavelength erbium-doped fiber laser (MW-EDFL) with wide tuning range, switching and adjustable wavelength interval is designed and tested, which is based on a composite filter. The filter consists of a tapered microfiber coupler loop (TMCL) with a nested single mode fiber (SMF)-two mode fiber (TMF)-SMF (STS) structure, which has a comb spectrum with obvious envelope and uniform fluctuation. Our experimental and theoretical results show that the laser can output thirteen wavelengths, when the angles of two polarization controllers (PCs) in the TMCL are accurately set. Moreover, by adjusting the PCs, the tuning range of single- to sextuple-wavelength can reach about 40 nm. Six non-adjacent multi-wavelength outputs can be observed in some specific polarization states. The maximum side-mode suppression ratio (SMSR) of the output laser is 40.6 dB. Compared with other multi-wavelength EDFL, the output characteristics of the laser, such as the adjustability and flexibility of wavelength spacing and the switch-ability of wavelength number, have been improved.

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Tunable full waveband- and adjustable spacing multi-wavelength erbium-doped fiber laser based on controlling cavity losses through bending sensitive interferometric filter

Cited by 10 publications

References 50 publications

Switchable mode-locked ytterbium-doped fiber laser based on macrobending loss tuning of figure-eight knot fiber structure

Switchable mode-locked ytterbium-doped fiber laser based on macrobending loss tuning of figure-eight knot fiber structure

Fiber laser with dual-channel and a selectable comb filter based on Vernier effect of parallel-connected two Mach–Zehnder interferometers

Tunable and Switchable Multi-Wavelength Erbium-Doped Fiber Laser Based on Composite Structure Filter

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